Platinum Acetylide Containing Conjugated Polymers

Photovoltaic devices based on pure 29 and 29 PCBM blend as the active layer is fabricated. It was interesting to observe that a device with pure 29 showed a higher power conversion efficiency (0.05%) compared to that consisting of a 29/PCBM blend (0.0.0024% to 0.041%). The good performance in the photovoltaic cells with 29 only was attributed to the efficient charge separation process and that the material exhibits efficient hole and electron transport. The C6o moieties facilitated that electron transport, while the holes are transported via the hopping between Pt2-thiophene units. 

FIGURE 7. Current-voltage characteristic of the device ITO/PEDOT PSS/polymer 30 PCBM/A1 under illumination with simulated AM 1.5 solar light. 

In this section, some ruthenium complex containing polymers incorporated with charge transport functionalities are presented. Being incorporated with both photosensitizing and charge transport units in the same polymer molecule, they are considered promising candidates for polymeric photovoltaic cells. However, the photovoltaic properties have not been reported so far. 

Ru complexes, and it was suggested that they are potential candidates for active photovoltaic devices. However, the absence of charge transport units in the polymer also means that bilayer or multilayer polymers are required in the fabrication of the devices. Details of the photovoltaic properties were not presented. 

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One of the current trends in transition metal acetylide-containing polymers is the incorporation of heterocyclic rings into their backbones in order to alter their electronic and optical properties. " Scheme 14 shows the reaction of monomers 52 and 54 with the platinum complex 30 to produce polymers 54 and 55, respectively. The optical gap and intersystem crossing from the singlet to triplet states decreased with increasing conjugation in the polymers. 

We have widened our scope in the current work to form a new series of platinum aryl-acetylide polymers and their dinuclear counterparts containing 0, S, SO, and SOj functional groups. These are remarkable model systems that can be used to evaluate how chalcogen-based conjugation-interrupters would limit the effective conjugation length of polymetallaynes. 

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